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Isolating Water Producing Zone
December 2007
An offshore gas well in Northwest India, drilled in 2003, was showing signs of increased water production. The decision was taken to isolate the water producing zone with a plug run on a Well Tractor and to open a sliding side door valve using a Well Tractor, Well Stroker and Well Key. This was carried out in a rigless environment and only involved a platform.
Three runs were required:
| 1. |
Due to previous experience, there was concern that sand had entered the well. A drift run with the Well Cleaner established that this was not the case. |
| 2. |
Setting a NPR plug at 85° was the second run using the Well Tractor and isolating the lower water producing zone. |
| 3. |
Opening the 3.688” sliding side door by means of the Well Tractor, Well Stroker and Well Key was the final run, which allowed access to a new producing interval. |
Achievements
| Operation Time: |
25 hours and 45 minutes in total |
| Production Increase: |
from 4 mmcft to 18 - 20 mmcft |
| Cost Reduction: |
¼ compared to coiled tubing |
Well Parameters
| Equipment Used: |
Well Tractor, Well Stroker, Well Key and Well Cleaner |
| Well Tractor traveled distance: |
3,610 ft (3,937 ft – 7,372 ft) |
| Max. Deviation: |
88° |
| Max. Temperature: |
153° F |
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Welltec has an excellent track record of performance.
Read more about the value we have created for our clients here.
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